Grinding-machine for grinding harvester-knives or other tools.



PATBNTED $1 11.26, 1904.

M. G. NIXON. I GRINDING MACHINE FOR GRINDING HARVESTBR KNIVES OR OTHERTOOLS.

APPLICATION FILED AUG. 1, 1901.

K0 MODEL.

- fio en 01" TM Wiirzesr .363

' ratented. April 26, 1904.

UNITED STATES PATENT OFFICE.

MOSES o. NIXON, or FORT WAYNE, INDIANA.

GRINDING-MACHINE FOR GRlNDING HARVESTER-KNIVES OR OTHER TOOLS.

SPECIFICATION forming part of Letters Patent N0.- 758,558, dated April26, 1904.

Application filed August 1, 1901.

To all whom, it Wmy concern.- I

Be it known that I, Mosns O. NIXON, of the city of Fort Wayne, in thecounty of Allen and State of Indiana,have invented certain new anduseful Improvements in Grinding Machines for Grinding Harvester-Knivesor other Tools, of which the following is a specification.

My invention relates to that class of grinders in which a rotatinggrinding-wheel is automatically oscillated in contact with the knife.

My invention consists, essentially, of the means for oscillating thegrinding-wheel, in certain details of construction whereby the grindingwheel maybe held in a fixed position when desired, and in the meansprovided for clamping the knife, substantially as hereinafter morespecifically described and then definitely claimed.

Figure 1 is a perspective view of my improved machine. Fig. 2 is aperspective detail of the bell-crank lever by meansof which thegrinding-wheel is oscillated.

A is the base-plate upon which are supported" the standards B,on whichis journaled the driving-shaft G. On this driving-shaft is secured themain driving gear-wheel D, provided with the operatinghandle E; Upon theshaft is. placed a sleeve F, carrying the cam G and the lock-wheel H.The sleeve is ordinarily held.

in driving connection with the shaft by means of the cotter-pin I.

Secured to the upper end of one of the standards B is a bracket J,extending over the upper part of the lock-"wheel In this bracket isformed a hole a, through which may be inserted the cotter-pin I toengage any one of the' notches or openings 6, formed in the rim of thelock-wheel H. Thus the sleeve after being released from itsdrivingconnection with the shaft C by the withdrawal of the cotterpin Imay be held in any desired position.

The cam G works within a long slot 0, formed in the upwardly extendingarm of the bellcrank lever K, which lever is pivoted on the shaft L,carried by the standards B. The other arm of the bell-crank lever K isprovided with .holes (2, so that the lower end of the link M- may beadjustably secured thereto. The other end of this link is pivoted on thecross-bar N,

carried by the arms 0, pivoted on the shaft C.

Serial No. 70,485. (No model.)

At the other end of these arms the shaft of the grinding-wheel Q, isjournaled.

To the shaft P is secured a gear-pinion R, meshing with the main drivinggear-wheel D. The knife carrier comprises a plate S, ad justably securedto the base A by means of the bolt a passing through a slot f in theplate S and the base A. Lugs g are formed on this plate S, and on theselugs is pivoted the rocking frame T. The lower part of this rockingframe is provided with the lugs h, extending both forwardly andbackwardly and slightly inclined upward, so as to permit of the frame Thaving a small backward and forward rocking motion. Secured to thisframe is the knife frame U, preferably adjustable on the frame T bymeans of the bolt c' passing through the slot j in the rocking frame 'T.This knifeframe is provided with the horizontal portion is, from whichextend vertically the clamplugs holding the knife. These are three innumber. One,fl, at the right-hand side of the machine extends upwardlyin front of the knife V and is bent'over and extends partway down behindthe knife, as shown by dotted lines. The downwardly extending portionmust, however, stop before it reaches a position in which it wouldinterfere with the free passage of the eye or its extending rib, usuallyformed at one end of'a knife for connection with the driving mechanismof the harvester or mower. Another clamping-lug, m,

-extends upwardly behind the knife and is cut away, as shown, to permitof the passage of the rib of the eye on the knife already referred to.The third clamp-lug, n, is in front of the knife between'the lugs Z andm and nearer to the latter. Upon the clamping-lug Z in front of theknife is pivoted the cam-lever 0, by means of which the knife issecurely clamped against the downwardly-projecting part of the lug Z andalso against the lug m. The lug n resists the pressure of thegrinding-wheel when the machine is in operation.

It will be noted that the lug "n is cutaway to provide free passage forthe bar p on the knife. The clamping-lug Z is also cut away or formed ofsuflicient width between the two parts to permit of the free passage ofthis .bar. For convenience the terms back and Too front in reference tothe knife-holder are used to correspond and agree with the same termsused in relation to the machine. The side of the knife referred to inthe specification and claims as the back is the side which is uppermostwhen the knife is in use, and the side that is referred to as the'frontis the side which is undermost when the knife is in use.

I find my arrangement of the clamping device very simple, effective, andconvenient. The knife is easily slid in from the right-hand side and isquickly clamped in any desired position by swinging the cam-lever 0toward the left and as quickly released by swinging it to the right. Byan upward pull on this lever the knife is brought into contact with thegrinding-wheel during the operation of grinding.

It is preferable to have an additional steadying lug or stop on thehorizontal portion Z: of the knife-frame behind the knife and adjacentto the outer side of the lug Z.

The reasons for providing the adjustments by means of the bolts 6 and Zare too obvious to require setting out.

The means employed for holding the grinding-wheel in a fixed position bywithdrawing the cotter-pin I and engaging it with the bracket J and thelocking-wheel H is an important feature of the invention, as thegrinding-wheel is thus very quickly and easily secured at any desiredheight for the purpose of grinding out notches in the knife or when itis desired to use the apparatus as an ordinary grindstone.

What I claim as my invention is 1. In a grinding-machine the combinationof a suitably-journaled driving-shaft; a sleeve loose thereon; means forforming at will a driving connection between the shaft and the sleeve; acam fast on the said sleeve; a lever pivoted on the frame of the machineand adapted to be oscillated by the said cam; arms suitably pivoted atone end; means whereby the oscillatory movement of the lever is conveyedto the said arms; a grinding-wheel journaled on the said arms; means forrotating the said wheel from the driving-shaft; a lock-wheel fast on theaforesaid sleeve; and means for locking the said wheel to somestationarypart.

2. In a grinding-machine the combination of a suitably-journaleddriving-shaft; a sleeve loose thereon; means for forming at will adriving connection between the shaft and the sleeve; a cam fast on thesaid sleeve; a bellcrank lever pivoted on the frame of the machine andhaving one arm slotted for engagement by the said cam; arms suitablypivoted at one end; a link pivotally connected with the other arm of thebell-crank lever and with the said arms; a grinding-wheel journaled onthe said arms; means for rotating the said wheel from the driving-shaft;a lock-wheel fast on the aforesaid sleeve; and means for locking thesaid wheel to some stationary part.

3. In a grinding-machine the combination of adriving-shaft; asleeveloose thereon; a pin forming a driving connection between the sleeve andshaft; a cam fast on the said sleeve; a lever pivoted on the frame ofthe machine and adapted to be oscillated by the said cam; arms suitablypivoted at one end; means whereby the oscillatory movement of the leveris conveyed to the said arms; a grinding-wheel journaled on the saidarms; means for rotating the said grinding-wheel from the drivingshaft;a lock-wh eel fast on the aforesaid sleeve and having holes or notchesformed therein; and a bracket with a hole therein extending from somestationary part in proximity to the lock-wheel so that a pin may beinserted through the hole into one of the holes or notches inthe-lock-wheel.

4. In a grinding-machine the combination of a driving-shaft; a sleeveloose thereon; a pin forming a driving connection between the sleeve andshaft; a cam fast on the said sleeve; a bell-crank lever pivoted on theframe of the machine and having one arm having holes formed therein forengagement by the said cam; arms suitably pivoted at one end; a linkpivotally connected with the other arm of the bell-crank lever and withthe said arms; a grinding-wheel journaled on the said arms;

means for rotating the said grinding-wheel 5 from the driving-shaft; alock-wheel fast on the aforesaid sleeve and having holes or notchesformed therein; and a bracket with a hole therein extending from somestationary part in proximity to the look-wheel so that a pin may beinserted through the hole into one of the holes or notches in thelock-wheel.

5. In a grinding-machine the knife-frame U provided with the horizontalportion k, the clamping-lug m engaging the back of the knife V, theclamping-lug n engaging the front of the knife; and the clamping-lug Zextending up in front of the knife and bent down to engage the back ofthe knife, in combination with the cam-lever 0 pivoted on the front ofthe clamping-lug Z.

6. In agrinding-machine the knife-frame U provided with the horizontalportion Z2, the clamping-lugm engaging the back of the knife and cutaway to admit the rib of the eye of the knife; the clamping-lug nengagingthe front of the knife; and the clamping-lug Zextending up infront of the knife and bent down to engage the back of the knife abovethe continuous part thereof, in combination with the cam-lever 0 pivotedon the front part of the clamping-lug Z.

7. In agrinding-machine the knife-frame U provided with the horizontalportion 7."; means connected with the horizontal portion it near one endto support both'the front and back of the knife; and the clamping-lug Zextending up in front of the knife near the other end of the saidhorizontal portion and bent down to engage the back of the knife.

' at one end; a'link pivotally connected with the other arm of the bellcrank lever and with the said arms; a grinding-wheel journaled on thesaid arms; and means for rotating the said wheel from the driving-shaft.

9. In a grinding-machine the combination of a suitably-journaleddriving-shaft; a cam having a driving connection therewith; a bellcranklever pivoted on the frame of the machine and having one arm slotted forengagement by the said cam; arms suitably pivoted at one end; a linkhaving an adjustable pivotal connection with the other arm of thebellcrank lever and with the said arms; a grinding-wheel journaled on.the said arms; and means for rotating the said wheel from thedriving-shaft.

10. In a grinding-machine, the combination of. a suitably-journaleddriving-shaft; a cam having. a driving connection therewith; a bellcranklever pivoted on the frame of the machine, and having one arm slottedfor engagement by the said cam; arms suitably pivoted at one end, andsuitable connections between the bell-crank lever, and the said arm;agrinding-wheel journaled on the said arms; and means for rotating thesaid wheel.

11. In a driving-machine, the combination of a' suitably-journaleddriving-shaft; a cam loose thereon; means for forming at will, a drivingconnection between the shaft and cam; a lever pivoted on the frame ofthe machine, and adapted to be oscillated by the said cam; arms suitablypivoted at one end; means whereby the oscillating movement is conveyedto said arms; a grinding-wheel journaled on the said arms; means forrotating the said wheel from the driving-shaft; a lock-wheel attached tosaid cam; and means for locking the said wheel to some stationary part.

' Toronto, July 25, 1901.

MOSES C. NIXON.

In presence of JOHN G. Rinoirr, J. W. VVEBs'rER.

